<template>
  <div class="main-content">
    <!-- 列表页 -->
    <div v-if="!showFlag">
      <el-form :inline="true" :model="searchForm" class="form-content">
        <el-form-item label="课后测试">
          <el-input v-model="searchForm.papername" placeholder="课后测试名称" clearable></el-input>
        </el-form-item>
        <el-form-item label="试题">
          <el-input v-model="searchForm.questionname" placeholder="试题名称" clearable></el-input>
        </el-form-item>
        <el-form-item>
          <el-button round @click="search()">查询</el-button>
          <el-button type="primary" @click="addOrUpdateHandler()" round>新增</el-button>
          <el-button :disabled="dataListSelections.length <= 0" type="danger" @click="deleteHandler()" round>删除
          </el-button>
          <download-excel v-if="isAuth('examquestion', '导出')" class="export-excel-wrapper" :data="dataList"
            :fields="json_fields" name="试卷题目.xls">
            <!-- 导出excel -->
            <el-button type="primary" icon="el-icon-download">{{ '导出' }}</el-button>
          </download-excel>
          <el-button v-if="isAuth('examquestion', '打印')" type="success" icon="el-icon-printer" @click="printJson">
            {{ '打印' }}</el-button>
        </el-form-item>
      </el-form>
      <div class="table-content">
        <el-table :data="dataList" border v-loading="dataListLoading" @selection-change="selectionChangeHandler"
          style="width: 100%;">
          <el-table-column type="selection" header-align="center" align="center" width="50"></el-table-column>
          <el-table-column width="300" prop="papername" header-align="center" align="center" sortable label="课后测试">
          </el-table-column>
          <el-table-column width="300" prop="questionname" header-align="center" align="center" sortable label="试题名称">
          </el-table-column>
          <el-table-column prop="score" header-align="center" align="center" sortable label="分值"></el-table-column>
          <el-table-column prop="answer" header-align="center" align="center" sortable label="答案"></el-table-column>
          <el-table-column prop="type" header-align="center" align="center" sortable label="类型">
            <template slot-scope="scope">
              <el-tag v-if="scope.row.type == 0">单选题</el-tag>
              <el-tag v-if="scope.row.type == 1" type="info">多选题</el-tag>
              <el-tag v-if="scope.row.type == 2" type="success">判断题</el-tag>
              <el-tag v-if="scope.row.type == 3" type="warning">填空题</el-tag>
              <el-tag v-if="scope.row.type == 4" type="primary">主观题</el-tag>
            </template>
          </el-table-column>
          <el-table-column fixed="right" header-align="center" align="center" width="150" label="操作">
            <template slot-scope="scope">
              <el-button type="text" icon="el-icon-edit" size="small" @click="addOrUpdateHandler(scope.row.id)">修改
              </el-button>
              <el-button type="text" icon="el-icon-delete" size="small" @click="deleteHandler(scope.row.id)">删除
              </el-button>
            </template>
          </el-table-column>
        </el-table>
        <el-pagination @size-change="sizeChangeHandle" @current-change="currentChangeHandle" :current-page="pageIndex"
          :page-sizes="[10, 20, 50, 100]" :page-size="pageSize" :total="totalPage"
          layout="total, sizes, prev, pager, next, jumper" class="pagination-content"></el-pagination>
      </div>
    </div>
    <!-- 添加/修改页面  将父组件的search方法传递给子组件-->
    <add-or-update v-else :parent="this" ref="addOrUpdate"></add-or-update>
  </div>
</template>
<script>
import AddOrUpdate from "./question-add-or-update";
export default {
  data() {
    return {
      searchForm: {
        key: ""
      },
      dataList: [],
      pageIndex: 1,
      pageSize: 10,
      totalPage: 0,
      dataListLoading: false,
      dataListSelections: [],
      showFlag: false,
      //导出excel
      json_fields: {
        "试卷名称": "papername",    //常规字段
        "题目名称": "questionname",    //常规字段
        "题目类型": {
          field: 'type',
          callback: value => {
            let str = ''
            switch (value) {
              case 0:
                str = '单选题'
                break
              case 1:
                str = '多选题'
                break
              case 2:
                str = '判断题'
                break
              case 3:
                str = '填空题'
                break
            }
            return str
          }
        },
        "选项": "options",    //常规字段
        "分值": "score",    //常规字段
        "正确答案": "answer",    //常规字段
        "答案解析": "analysis",    //常规字段
      },
      json_meta: [
        [
          {
            " key ": " charset ",
            " value ": " utf- 8 "
          }
        ]
      ]
    };
  },
  mounted() {
    this.init();
    this.getDataList();
  },
  components: {
    AddOrUpdate
  },
  methods: {
    init() { },
    search() {
      this.pageIndex = 1;
      this.getDataList();
    },
    // 获取数据列表
    getDataList() {
      this.dataListLoading = true;
      var params = {
        page: this.pageIndex,
        limit: this.pageSize,
        sort: "id"
      };
      if (this.searchForm.papername) {
        params['papername'] = `%${this.searchForm.papername}%`
      }
      if (this.searchForm.questionname) {
        params['questionname'] = `%${this.searchForm.questionname}%`
      }
      this.$http({
        url: this.$api.examquestionpage,
        method: "get",
        params: params
      }).then(({ data }) => {
        if (data && data.code === 0) {
          this.dataList = data.data.list;
          this.totalPage = data.data.total;
        } else {
          this.dataList = [];
          this.totalPage = 0;
        }
        this.dataListLoading = false;
      });
    },
    // 每页数
    sizeChangeHandle(val) {
      this.pageSize = val;
      this.pageIndex = 1;
      this.getDataList();
    },
    // 当前页
    currentChangeHandle(val) {
      this.pageIndex = val;
      this.getDataList();
    },
    // 多选
    selectionChangeHandler(val) {
      this.dataListSelections = val;
    },
    // 添加/修改
    addOrUpdateHandler(id) {
      this.showFlag = true;
      this.$nextTick(() => {
        this.$refs.addOrUpdate.init(id);
      });
    },
    // 删除
    deleteHandler(id) {
      var ids = id
        ? [Number(id)]
        : this.dataListSelections.map(item => {
          return Number(item.id);
        });
      this.$confirm(`确定进行[${id ? "删除" : "批量删除"}]操作?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        this.$http({
          url: this.$api.examquestiondelete,
          method: "post",
          data: ids
        }).then(({ data }) => {
          if (data && data.code === 0) {
            this.$message({
              message: "操作成功",
              type: "success",
              duration: 1500,
              onClose: () => {
                this.search();
              }
            });
          } else {
            this.$message.error(data.msg);
          }
        });
      });
    },
    async printJson() {
      //通过getdata调用后台接口获取数据封装到res
      this.list = this.dataList;
      let data = []
      for (let i = 0; i < this.list.length; i++) {
        let typeName = '';
        if (this.list[i].type == 0) {
          typeName = '单选题'
        } else if (this.list[i].type == 1) {
          typeName = '多选题'
        } else if (this.list[i].type == 2) {
          typeName = '判断题'
        } else if (this.list[i].type == 3) {
          typeName = '填空题'
        }
        data.push({
          papername: this.list[i].papername,
          questionname: this.list[i].questionname,
          type: typeName,
          options: this.list[i].options,
          score: this.list[i].score,
          answer: this.list[i].answer,
          analysis: this.list[i].analysis,
        })
      }
      printJS({
        printable: data,
        properties: [
          {
            field: 'papername',
            displayName: '试卷名称',
            columnSize: 1
          },
          {
            field: 'questionname',
            displayName: '题目名称',
            columnSize: 1
          },
          {
            field: 'type',
            displayName: '题目类型',
            columnSize: 1
          },
          {
            field: 'options',
            displayName: '选项',
            columnSize: 1
          },
          {
            field: 'score',
            displayName: '分值',
            columnSize: 1
          },
          {
            field: 'answer',
            displayName: '正确答案',
            columnSize: 1
          },
          {
            field: 'analysis',
            displayName: '答案解析',
            columnSize: 1
          },
        ],
        type: 'json',
        header: '试卷题目',
        // 样式设置
        gridStyle: 'border: 2px solid #3971A5;',
        gridHeaderStyle: 'color: red;  border: 2px solid #3971A5;'
      })
    },
  }
};
</script>
<style lang="scss" scoped>
//导出excel
.export-excel-wrapper {
  display: inline-block;
}

.form-content {
  background: transparent;
}

.table-content {
  background: transparent;
}
</style>
